I recently signed up to QualityHostonline in order to host a number of domains on a constantly improving package. The price for what you actually get seems very good. My VPS is very quick.
I had to create a ticket for an issue, which ended up being a port that needed to be enabled on my firewall. That issue was fixed in no time and the qualityhostonline support team was knowledgeable and extremely quick to respond.
They offer RAID Protected Space, they use Custom Built Supermicro Servers - great plus for them.
Their VPS are KVM-based. They use a Webmin/cPanel Control Panels, they are fairly well feature packed, and easy to use.
I am extremely satisfied with them!